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  ~ regarding copyright ownership.  The ASF licenses this file
  ~ to you under the Apache License, Version 2.0 (the
  ~ "License"); you may not use this file except in compliance
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Profile notification client
    </title>
</head>
<body>
<script>
  // <1>
  var socket = new WebSocket('ws://localhost:8080/ws');
  // <2>
  socket.addEventListener('message', function (event) {
    window.alert('message from server: ' + event.data);
  });
</script>
</body>
</html>
